Mobile phone signal jammers are produced to reasonably avoid and interfere with mobile phone related signals, such as GPS, WIFI, 2G, 3G, 4G or future 5G. Mainly used in school examination rooms, prisons, detention centers, etc. In order to ensure the fairness and justice of the examination, the high school entrance examination and the college entrance examination are usually mock examinations. So how should signal jammer be selected? From the manufacturer's point of view, if the selection is not appropriate, it is easy to cause the product to be returned or the installation is ineffective.
Shop around and choose products from three companies, extensively research and understand:
1. Investigate product quality, technical means, and brand;
2. Through network search, get a preliminary understanding and communicate with technical personnel, and listen to technical explanations;
Second, see the effect of the prison demonstration:
Choose a few from the best and go to the field to test and demonstrate the shielding effect;
The actual effect of the case study:
1. After the product has been demonstrated, the application, operation status and actual effect of the product in other similar projects can be inspected;
2. During the inspection, it is best to bring the mobile phone into the shielding area after obtaining approval to verify the shielding effect.
4. Simple and quick method of judging equipment:
Equipment that can be considered
1. The area that should be shielded is not strictly shielded, the cost is high, and the effect is poor;
2. The area that should not be shielded is severely disturbed, complained, and cannot be used normally;
3. Too much bias towards detection and pseudo base station technology, there is a gap between ideal and reality. At present, there are no real successful cases in China;
Unsuitable equipment
1. Small size, the main unit and power supply are separated, and a circuit board is used inside;
2. An additional protective box is required, which is small in size and light in weight;
3. The natural heat dissipation area is small or use a fan to help heat dissipation;
4. There is a lot of circulating air inside and outside the equipment, which is easy to corrode inside.